CN112387779A - 一种针灸医用不锈钢线及其制备方法 - Google Patents
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Abstract
本发明公开了一种针灸医用不锈钢线,其重量百分比含量的成分包括:C:0.055~0.085,Si:0.4~1.2,Mn:3.0~8.0,S:≤0.030,P:≤0.035,Cr:17~20.0,Ni:3.00~6.00,Cu:0.2‑1.2,Ag:0.02‑0.08,Ti:0.1‑0.5,其余为N和Fe,利用N和Ni协同效应控制合金室温以下形成奥氏体组织。本发明还公开了一种针灸医用不锈钢线的制备方法,通过Ti细化晶粒,提高强度,加入一定含量铜和银,使铜和银固溶于合金中成为铜和银离子协同作用提高不锈钢线抗菌能力,且采用真空控氮熔炼热轧成形后,通过粗、中、细冷拉拔工艺,能够连续生产出高性能的针灸医用不锈钢线。
Description
技术领域
本发明属于医用技术领域,具体涉及一种针灸医用不锈钢线及其制备方法。
背景技术
不锈钢的优异加工及耐蚀性能、性价比高等特点,在微创器械制造、支架、针灸等医用领域中应用广泛。自“非典”爆发以来,国内外学者对抗菌领域开始重视,尝试制备具有抗菌性不锈钢。银是抗菌性很强的金属元素,大约是铜的100倍。由于Ag+会与细菌相结合,添加少量的银就能使不锈钢具有很强的抗菌性,此外Ag+能很好的破坏细菌和病毒蛋白结构,和蛋白中的硫原子结合,导致蛋白质丧失活性。针灸用的钢针活动在人体的关键穴位,自身的无菌性具有非常重要的意义。通过在不锈钢中加入一定含量铜和银,使铜和银固溶于合金中成为铜和银离子,通过铜和银离子协同作用抗菌。
发明内容
本发明通过成分和工艺设计,提供一种室温具有高成形性、耐腐蚀性、高强度和良好抗菌性能的针灸医用不锈钢线及其制备方法。
为实现上述目的,本发明所采用技术方案为:针灸医用不锈钢线的重量百分比含量的成分包括:C:0.055~0.085,Si:0.4~1.2,Mn:3.0~8.0,S:≤0.030,P:≤0.035,Cr:17~20.0,Ni:3.00~6.00,Cu:0.2-1.2,Ag: 0.02-0.08,Ti:0.1-0.5,其余为N和Fe。
根据成分配制原材料精炼,在真空中控氮精炼,热轧成形,粗、中、细冷拉拔成形,具体步骤为:
S1:配制原材料,装炉抽真空至0.1-1Pa后通氮0.5-1大气压,在 1540-1570℃熔炼完后降温至1500-1540℃浇注。
S2:将步骤S1铸锭加热到1100-1180℃轧制成直径5.5mm钢线后水冷烘干,控制卷速为4-6m/min,使用浓度20%±1%AM500皮膜剂90±3℃皮膜处理,200 ±10℃烘干。
S3:将步骤S2钢线采用硬脂酸钠作为润滑剂在钨硬质合金模中连续拉拔成直径为5.5mm、4.6mm、3.7mm、3.1mm、2.6mm钢线,出线速度约200-250m/min,采用硫酸浓度10±2%、单根钢丝直流4-5A、24-30V电解酸洗,水冲洗烘干,8 ±1m/min进入通50ml/min氨气的退火炉中,1050℃-1100℃固溶处理后水冷,清洗烘干,用浓度15%±1%AM500皮膜剂90±3℃皮膜处理,160±10℃烘干。
S4:将步骤S3钢线采用硬脂酸钠为润滑剂在聚晶钻石模中连续拉拔成直径为2.6mm、2.2mm、1.9mm、1.7mm、1.6mm、1.50mm钢线,出线速度180-200m/min,采用硫酸浓度10±2%、单根钢丝直流4-5A、24-30V电解酸洗,水冲洗烘干,12 ±2m/min进入通50ml/min氨气的退火炉中,1050℃-1100℃固溶处理后水冷。
S5:将步骤S4钢线浸泡在润滑油的聚晶钻石模中连续拉拔成直径为1.5mm、1.37mm、1.25mm、1.15mm、1.05mm、0.96mm、0.90mm针灸医用不锈钢线,出线速度160-180m/min。
本发明的有益效果在于:降低对人体有害Ni元素,利用N和Ni协同效应控制合金室温以下形成奥氏体组织,保证不锈钢线良好成形性和抗腐蚀性,通过细化晶粒,提高强度,利用铜离子和阴离子的协同作用抗菌,通过真空精炼、热轧成形和粗、中、细拉拔工艺连续生产出高性能针灸医用不锈钢线。
附图说明
图1为1140℃轧制成直径5.5mm钢线室温组织的示意图。
具体实施方式
实施例1
一种针灸医用不锈钢线,采用配制样品(wt%),C:0.055、Si:1.2、Mn: 3.0、S:≤0.030、P:≤0.035、Cr:20.0、Ni:6.00、Cu:0.2、Ag:0.08、 Ti:0.1,控制N含量、其余为Fe。将原材料装炉抽真空至0.1Pa后通氮气1大气压,在1550℃熔炼后1520℃浇注。在1100℃轧制成直径5.5mm钢线水冷烘干。用浓度20%AM500皮膜剂90℃皮膜处理,200℃烘干。采用硬脂酸钠作为润滑剂在钨硬质合金模中自动连续拉拔为直径5.5、4.6、3.7、3.1、2.6mm钢线,出线速度约250m/min。利用硫酸浓度10%、单根直流5A、24V进行电解酸洗,水冲洗烘干。8m/min进入通50ml/min氨气气氛退火炉中1050℃固溶处理后水冷。用浓度15%AM500皮膜剂90℃皮膜处理,160℃烘干。采用硬脂酸钠作为润滑剂在聚晶钻石模中自动连续拉拔为直径2.6、2.2、1.9、1.7、1.6、1.50mm钢线,出线速度约200m/min。利用硫酸浓度10%、单根直流5A、24V电解酸洗,水冲洗烘干。12m/min进入通50ml/min氨气气氛退火炉中1050℃固溶处理后水冷。最后穿入浸泡在润滑油的聚晶钻石模中自动连续拉拔为直径1.5、1.37、1.25、1.15、1.05、0.96、0.90mm针灸医用不锈钢线。将该不锈钢线与304不锈钢线相比硬度提高6HV,粘上酸奶相同条件下每隔24小时闻气味和在金相显微镜下观察,该不锈钢线有较好抗菌性。
实施例2
一种针灸医用不锈钢线,采用配制样品(wt%),C:0.075、Si:0.5、Mn: 4.0、S:≤0.030、P:≤0.035、Cr:19.0、Ni:5.00、Cu:0.5、Ag:0.07、 Ti:0.3,控制N含量、其余为Fe。将原材料装炉抽真空至0.1Pa后通氮气0.8 大气压,在1550℃熔炼后1520℃浇注。在1120℃轧制成直径5.5mm钢线水冷烘干。用浓度20%AM500皮膜剂90℃将该不锈钢线和304皮膜处理,200℃烘干。采用硬脂酸钠作为润滑剂在钨硬质合金模中自动连续拉拔为直径5.5、4.6、3.7、3.1、2.6mm钢线,出线速度约250m/min。利用硫酸浓度10%、单根直流5A、24V 电解酸洗,水冲洗烘干。8m/min进入通50ml/min氨气气氛退火炉中1050℃固溶处理后水冷。用浓度15%AM500皮膜剂90℃皮膜处理,160℃烘干。采用硬脂酸钠作为润滑剂在聚晶钻石模中自动连续拉拔为直径2.6、2.2、1.9、1.7、1.6、 1.50mm钢线,出线速度约200m/min。利用硫酸浓度10%、单根直流5A、24V电解酸洗,水冲洗烘干。12m/min进入通50ml/min氨气气氛退火炉中1050℃固溶处理后水冷。最后穿入浸泡在润滑油的聚晶钻石模中自动连续拉拔为直径1.5、 1.37、1.25、1.15、1.05、0.96、0.90mm针灸医用不锈钢线。将该不锈钢线与 304不锈钢线相比硬度提高12HV,粘上酸奶相同条件下每隔24小时闻气味和在金相显微镜下观察,该不锈钢线有较好抗菌性。
实施例3
一种针灸医用不锈钢线,采用配制样品(wt%),C:0.085、Si:0.6、Mn: 5.0、S:≤0.030、P:≤0.035、Cr:18.5、Ni:4.00、Cu:0.8、Ag:0.06、 Ti:0.1,控制N含量、其余为Fe。将原材料装炉抽真空至0.1Pa后通氮气0.6 大气压,在1550℃熔炼后1520℃浇注。在1150℃轧制成直径5.5mm钢线水冷烘干。用浓度20%AM500皮膜剂90℃皮膜处理,200℃烘干。采用硬脂酸钠作为润滑剂在钨硬质合金模中自动连续拉拔为直径5.5、4.6、3.7、3.1、2.6mm钢线,出线速度约250m/min。利用硫酸浓度10%、单根直流5A、24V进行电解酸洗,水冲洗烘干。8m/min进入通50ml/min氨气气氛退火炉中1070℃固溶处理后水冷。用浓度15%AM500皮膜剂90℃皮膜处理,160℃烘干。采用硬脂酸钠作为润滑剂在聚晶钻石模中自动连续拉拔为直径2.6、2.2、1.9、1.7、1.6、1.50mm 钢线,出线速度约200m/min。利用硫酸浓度10%、单根直流5A、24V电解酸洗,水冲洗烘干。12m/min进入通50ml/min氨气气氛退火炉中1070℃固溶处理后水冷。最后穿入浸泡在润滑油的聚晶钻石模中自动连续拉拔为直径1.5、1.37、 1.25、1.15、1.05、0.96、0.90mm针灸医用不锈钢线。将该不锈钢线与304不锈钢线相比硬度提高7HV,粘上酸奶相同条件下每隔24小时闻气味和在金相显微镜下观察,该不锈钢线有较好抗菌性。
实施例4
一种针灸医用不锈钢线,采用配制样品(wt%),C:0.065、Si:0.8、Mn: 6.0、S:≤0.030、P:≤0.035、Cr:19.5、Ni:3.00、Cu:0.8、Ag:0.05、 Ti:0.6,控制N含量、其余为Fe。将原材料装炉抽真空至0.1Pa后通氮气0.5 大气压,在1550℃熔炼后1520℃浇注。在1140℃轧制成直径5.5mm钢线水冷烘干。用浓度20%AM500皮膜剂90℃皮膜处理,200℃烘干。采用硬脂酸钠作为润滑剂在钨硬质合金模中自动连续拉拔为直径5.5、4.6、3.7、3.1、2.6mm钢线,出线速度约250m/min。利用硫酸浓度10%、单根直流5A、24V进行电解酸洗,水冲洗烘干。8m/min进入通50ml/min氨气气氛退火炉中1040℃固溶处理后水冷。使用浓度15%AM500皮膜剂90℃皮膜处理,160℃烘干。采用硬脂酸钠作为润滑剂在聚晶钻石模中自动连续拉拔为直径2.6、2.2、1.9、1.7、1.6、1.50mm 钢线,出线速度约200m/min。利用硫酸浓度10%、单根直流5A、24V电解酸洗,水冲洗烘干。12m/min进入通50ml/min氨气气氛退火炉中1040℃固溶处理后水冷。最后穿入浸泡在润滑油的聚晶钻石模中自动连续拉拔为直径1.5、1.37、 1.25、1.15、1.05、0.96、0.90mm针灸医用不锈钢线。将该不锈钢线与304不锈钢线相比硬度提高13HV,粘上酸奶相同条件下每隔24小时闻气味和在金相显微镜下观察,该不锈钢线有较好抗菌性。
将实例1-4热轧固溶处理取样,通过成分控制在室温下都形成奥氏体组织,成形性好,其中实例4,在1140℃轧制成直径5.5mm钢线室温金相组织如图1 所示。
以上所述,仅为本发明较佳的具体实施方式,但本发明的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本发明揭露的技术范围内,根据本发明的技术方案及其发明构思加以等同替换或改变,都应涵盖在本发明的保护范围之内。
Claims (8)
1.一种针灸医用不锈钢线,其特征在于:其重量百分比含量的成分包括:C:0.055~0.085,Si:0.4~1.2,Mn:3.0~8.0,S:≤0.030,P:≤0.035,Cr:17~20.0,Ni:3.00~6.00,Cu:0.2-1.2,Ag:0.02-0.08,Ti:0.1-0.5,其余为N和Fe。
2.一种针灸医用不锈钢线制备方法,其特征在于:制备过程包括根据成分控制,在真空中控氮精炼,热轧成形,粗、中、细冷拉拔成形,具体步骤为:
S1:设计和配制原材料成分,真空控氮熔炼成铸锭;
S2:将步骤S1铸锭加热轧成直径5.5mm钢线,并进行皮膜处理;
S3:将步骤S2钢线按直径5.5mm,4.6mm,3.7mm,3.1mm,2.6mm连续冷拉拔后清洗烘干,固溶软化和皮膜处理;
S4:将步骤S3钢线按直径2.6mm,2.2mm,1.9mm,1.7mm,1.6mm,1.50mm连续冷拉拔后清洗烘干,并固溶软化处理;
S5:将步骤S4钢线按直径1.5mm,1.37mm,1.25mm,1.15mm,1.05mm,0.96mm,0.90mm连续冷拉拔。
3.根据权利要求1所述的一种针灸医用不锈钢线,其特征在于:在重量百分比含量中降低有害Ni含量,调控N含量,利用N和Ni协同效应控制合金室温以下形成奥氏体组织,保证高成形性和耐腐蚀性,Ti细化晶粒,提高强度,加入一定含量铜和银,使铜和银固溶于合金中成为铜和银离子协同作用提高钢线抗菌能力。
4.根据权利要求2所述的一种针灸医用不锈钢线制备方法,其特征在于:在所述步骤S1中,抽真空为0.1-1Pa,通氮气0.5-1大气压,熔炼温度1540-1570℃,浇注温度1500-1540℃。
5.根据权利要求2所述的一种针灸医用不锈钢线制备方法,其特征在于:在所述步骤S2中,铸锭加热到1100-1180℃,以4-6m/min轧制成直径5.5mm钢线后水冷烘干,用浓度20%±1%AM500皮膜剂90±3℃进行皮膜处理,并用200±10℃的温度烘干。
6.根据权利要求2所述的一种针灸医用不锈钢线制备方法,其特征在于:在所述步骤S3中,采用硬脂酸钠作为润滑剂在钨硬质合金模中连续拉拔成直径为5.5mm,4.6mm,3.7mm,3.1mm,2.6mm钢线,出线速度200-250m/min,采用硫酸浓度10±2%,单根钢线直流4-5A,24-30V电解酸洗,水冲洗烘干,以8±1m/min速度进入通有50ml/min氨气的退火炉中,1050-1100℃固溶处理后水冷,清洗烘干,用浓度15%±1%AM500皮膜剂90±3℃皮膜处理,并用160±10℃的温度烘干。
7.根据权利要求2所述的一种针灸医用不锈钢线制备方法,其特征在于:在所述步骤S4中,采用硬脂酸钠作为润滑剂在聚晶钻石模中连续拉拔成直径为2.6mm,2.2mm,1.9mm,1.7mm,1.6mm,1.50mm钢线,出线速度180-200m/min,采用硫酸浓度10±2%,单根钢丝直流4-5A,24-30V电解酸洗,水冲洗烘干,并以12±1m/min速度进入通有50ml/min氨气的退火炉中,1050-1100℃固溶处理后水冷。
8.根据权利要求2所述的一种针灸医用不锈钢线制备方法,其特征在于:在所述步骤S5中,采用浸泡在润滑油的聚晶钻石模中连续拉拔成直径为1.5mm,1.37mm,1.25mm,1.15mm,1.05mm,0.96mm,0.90mm的针灸医用不锈钢线,且出线速度160-180m/min。
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